<s>
The	O
Sharp	B-Device
PC-1403	I-Device
was	O
a	O
small	O
scientific	O
calculator	O
and	O
pocket	B-Device
computer	I-Device
manufactured	O
by	O
Sharp	O
.	O
</s>
<s>
It	O
was	O
the	O
successor	O
of	O
the	O
Sharp	B-Device
PC-1401	I-Device
,	O
and	O
had	O
better	O
display	O
,	O
more	O
RAM	B-Architecture
and	O
better	O
system	O
software	O
.	O
</s>
<s>
It	O
is	O
possible	O
to	O
convert	O
the	O
1403	O
to	O
a	O
1403H	O
by	O
removing	O
the	O
8	O
K	O
RAM	B-Architecture
and	O
soldering	O
in	O
a	O
32	O
K	O
RAM	B-Architecture
.	O
</s>
<s>
In	O
the	O
former	O
,	O
the	O
PC-1403	B-Device
would	O
behave	O
like	O
a	O
normal	O
scientific	O
calculator	O
at	O
the	O
time	O
with	O
formulas	O
entered	O
in	O
algebraic	O
logic	O
.	O
</s>
<s>
The	O
programming	O
model	O
employed	O
was	O
unstructured	O
BASIC	O
for	O
which	O
the	O
PC-1403	B-Device
distinguished	O
between	O
RUN	O
and	O
PRO	O
mode	O
.	O
</s>
